Pulp beater



Demo 22, 1931.

w. A. BESSMER PULP BEATER 2 Sheets-Shee Filed Oct. 21, 1950 INVENTOR W/LL/AM AU6U5TBS5MER ATTORNEY Dec. 22, 1931. w. A. BESSMER 9 9 59 PULP BEATER Filed Oct. 21, 1950 2 Sheets-Sheet 2 iNVENTOFZ WILL/AM Aueusr 355mm ATTORNEY ldatented Dec. 22,, iQSl? new shares.

Application filed Qctober 21,1930. Serial No. 490,174.,

This invention relates to improvements in the construction of pulp boaters employed in the manufacture of paper, and the like. It has particular reference to the operating de- 5 vices for such beaters.

A primary purpose of the invention has been to simplify and improve the form of drive employed in connection with apparatus of this type, which will efiect a considerable n saving in the amount of space required and an 7 economy in the construction over driving connections now commonly employed. Heretotore it has been the general practice to provide the main-shaft of a pulp beater with is a pulley which is driven by means of a belt from either a power shaft, usually located on the floor beneath that on which the heater is situated, or from a separate motor unit, which is located at a more or less remote point on so the same floor on which the heater is mounted.

Both of theseprior types of drive are unsatisfactory for various reasons. In the first place, they are exceedingly cumbersome and require an excessive amount of space in com- 25 parison with that utilized by the beater itself. Furthermore. belts of all sorts are subject to breakage so that their repair becomes necessary at comparatively frequent intervals, and

at such times it is necessary to shut-down the so operation of the heaters with a consequent loss in production. In addition to this belts are expensive both from the standpoint of their initial cost and in the matter of upkeep so desirable.

Now, the present invention contemplates the elimination of the belt, or similar driving means, and the employment of a direct connection between a motor, mounted adjacent the beater, and the main shaft of the beater. A diiiicultv which-has been encountered in the provision of such a direct connection in the common beater construction is that the beater shaft must be capable of bodilv vertical movementtransverse to its axis. This is for the reason that in this type of construction the shaft carries a large beater roll which acts upon a quantity of pulp fed between this roll and a stationary bed-plate at the bottom of the beater. Occasionally an that for this further eason they are una excessively thick lap of pulp or paper is passed beneath the roll and it is necessary at such times that the roll should yield upwardly to permit this lap to pass rather than place an excessive load upon the apparatus, which would result from attempting to force the pulp beneath a relatively stationary roll. Furthermore, it is not possible to directly couple a driving motor to the main shaft of the beater since the speed of operation of the latter is necessarily much slower than that obtainable directly from a motor. It is accordingly necessary to provide suitable reduction gearing between the shaft of the motor and the main'shaft of the heater. in accordance with the present invention provision is made, both for the vertical movement of the beater shaft-andfor a speed reduction between the motor and the beater. A simple .andefiective construction has been developed,

and one which requires a minimum of space so that a larger number of beatersmay be installed in a floor space of given dimension.

Other features and advantages of the invention will appear from the detailed description of an illustrative embodiment of the same, which will now be given in conjunction with the accompanying drawings, in which:

Figure 1 is a side, elevational view out the driving mechanism for a beater showing its relation to a portion of the beater.

Figure 2 is a view in end elevation of the riving mechanism and a portion of the beater, and

Figure 3 is a plan view of the supporting structure for the. driving mechanism.

Referring now to the drawings, there is shown a small section of a heater structure 10 which may be of any conventional form The main shaft 11 of the beater, on which may be mounted the usual beating roll within the main chamber of the beater, extends outwardly through the side wall. This shaft may be journalled in any conventional way, not illustrated, to permit vertical movement under the conditions previously mentioned,

.as when an excessively large lap of pulp is introduced between the beater roll and the bed-plate of the apparatus in the course of circulation of the pulp. I

On the shaft 11, and secured thereto, is a large wormwheel 12 mounted within a suitable casing 13, which is loosely carried by the end of the shaft. The casing 13 is provided with bearings surrounding the shaft so that the latter may be rotated within the casing but the casing will be shifted vertically upon vertical transverse or bodily movements of the shaft. The wormwheel 12 is in mesh with a worm 14: carried by a shaft 15, which is suitably journalled in bearings carried by the lower portion of the housing 13. Any suitable coupling 16 may serve to connect the shaft 15 with the shaft 17 of a motor 18. The latter may be of any suitable construction and should be of suficient capacity to properly'drive the beater under conditions of maximum load. a

For the purpose of supporting the driving motor in its proper relation to the wormwheel casing 13, the base of the motor is supported by a platform 19 constituting. a part of a beam 20 which is suitably pivoted on apor-' tion of a frame 200 rigidly fastened to the floor adjacent the side of the beater. This frame may conveniently be formed with two vertical disposed supporting members connected by suitable base plates at the bottom. The beam may then be pivotally suspended between the vertical members of the frame. For this purpose astud 201 may be passed through suitable openings in the vertical 7 members of the frame and through an opening in the beam 20. Beneath the shaft 11 a platform 21 may be provided on the beam for sup-. porting the bottom of the casing; 13. The latter may be suitably bolted to t e platform in the manner shown in Figure 1. This construction will prevent turning of the casing 13 about the shaft 11, except to the slight, al-

most negligible, extent permitted by the beam 20, and will at the same time cause the motor and speed reduction unit to remain in the proper relation during vertical movements of the shaft 11. the shaft 11 will cause the motor 18 to rock downwardly about the pivot 201 so that the shafts 15 and 17 willalways be maintained in aligned positions.

The free end of the beam 20 may be supported, if desired. sons to limit its downward movement without interfering with its free, vertical movement at such times when the shaft 11 may be compelled to rise. For this purpose an extension 22 of the beam mav be provided with an opening 23 which, as illustrated, may be square in cross section and adapted to co-operate with a rod 24 the lower portion of which is also square in cross sectionbut smaller than the opening23 so as to permit free sliding of the beam along the rod. At its lower end the rod is provided with an enlarged head240 adapted Thus an upwardmovement of elevation. The up er end of the rod 24: may

be threaded, as in icated at 25, and may cooperate with the internal threads of a nut or sleeve 26. The latter may have secured to it a wormwheel 27 meshing with a worm 28, which is adapted to be rotated by a thumbwheel or hand-wheel 29. Turning of this wheel will rotate the wormwheel 27 and sleeve or nut 26 to cause longitudinal adjustment of the rod 24. A'lcwer, limit to the downward movement of the free or lefthand end of the beam 20 may be established further by means of a bolt or'set screw 30 carriedby the frame 200 beneath the beam and adapted to be locked in any set position by a nut 31. In this way the normal position of the beater roll-with relation to the bed-plate may be established and the roll may be maintained at all times out of direct contact has been set forth in considerable detail, it

will be understood'that various modifications may be effected in the construction and arrangement of the several parts without departing from the general spirit and scope of the invention. The terms and expressions employed herein have been used to describe the illustrated embodiment of the invention and are not intended to impose any limitations on its scope.

What I claim is:

1. In a pulp beater a main drive shaft adapted to be shifted bodily in a transverse direction a beam pivotally mounted adjacent the end of said shaft, a motor mounted on said beam, and reduction gearing between said motor and said shaft.

2. In a-pulp beater a main drive shaft adapted for transverse vertical movement, speed reducing devices carried by said shaft, and a motor directly coupled to said speed reducing devices.

3. In a pulp beater a main drive shaft adapted to be bodily shifted in a transverse direction, a motor mounted adjacent the end of said shaft, and positive connections between said motor and shaft.

4. In a pulp beater a main drive shaft adapted for bodily transverse movement, a frame adjacent the end of said shaft, a motor, speed reducing devices connecting said motor to said shaft, and means pivotally mounted on said frame for supporting said motor and reducing devices.

5. In a pulp beater a main drive shaft adapted for bodily transverse movement, a frame adjacent the end of said shaft, 9. motor, speed reducing devices connecting said motor to said shaft, means pivotally mounted on said frame for supporting said motor and reducing devices and a stop cooperating with said pivotally mounted means for limiting the movement thereof.

6. In apparatus of the class described a shaft adapted to be shifted transversely, a motor for driving said shaft and positively connected thereto, and means controlled by 5 said shaft for shifting said motor bodil upon transverse movements of said shaft. j

7. In apparatus of the class described, a shaft adapted to be shifted transversely, a motor for driving said shaft and positively 10 connected thereto, means controlled by said shaft for shifting said motor bodily upon transverse movements of said shaft and means for limiting bodily movement of the motor in one direction.

15 8. In apparatus of the class described a shaft adapted to beshifted transversely, a

motor for driving said shaft speed reducing devices positively connecting said motor to said shaft, and means for shifting said motor upon transverse movements of said shaft to maintain a positive connection between them.

In testimony whereof, I'have signed my name to this specification this 16th day of October, 1930.

25 WILLIAM AUGUST BESSMER. 

